Rare opportunity to own a fully renovated four-unit investment package in Somerville's highly sought-after Assembly neighborhood. This unique offering includes three newly created luxury residences in the main building PLUS a detached, newly constructed, fully sound-insulated cottage (ADU), providing an ideal mix of privacy, modern design, and exceptional income potential. Projected to deliver a 5%+ cap rate, this turnkey investment combines strong cash flow with long-term appreciation. Rents in MLS are estimated. Each residence features high-end finishes, designer kitchens with quartz countertops, premium cabinetry, luxury bathrooms, energy-efficient HVAC systems, in-unit laundry, and thoughtfully designed open floor plans. The detached cottage offers the feel of a private single-family home while benefiting from the convenience of an established multifamily property. All four units have been designed for low-maintenance ownership with modern building systems throughout. Just minutes from Assembly Row, Union Square, public transportation, restaurants, shopping, and major commuter routes, this is an exceptionally rare opportunity for investors or owner-occupants seeking a premium, income-producing asset.